/ Dictionary / Index M microinject: Meaning and Definition of Find definitions for: mi•cro•in•ject Pronunciation: (mī"krō-in-jekt'), [key] — v.t. Biol. to inject into a single cell or cell part. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microinch microinjection Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language